Article
Biochemistry & Molecular Biology
Dovydas Blazevicius, Daiva Tavgeniene, Simona Sutkuviene, Ernestas Zaleckas, Ming-Ruei Jiang, Sujith Sudheendran Swayamprabha, Rohit Ashok Kumar Yadav, Jwo-Huei Jou, Saulius Grigalevicius
Summary: Novel host derivatives containing low molar mass compounds with pyridinyl-carbazole fragments showed promising characteristics in electro-phosphorescent organic light-emitting devices, demonstrating high stability, high glass transition temperatures, and efficient power and current efficiencies in blue and green PhOLEDs.
Article
Materials Science, Multidisciplinary
Soo-Ghang Ihn, Eun Suk Kwon, Yongsik Jung, Jong Soo Kim, Sungho Nam, Joonghyuk Kim, Sangmo Kim, Soon Ok Jeon, Yeon Sook Chung, Sangho Park, Dal Ho Huh, Hyun Jung Kim, Hosuk Kang, Namheon Lee, Hye Jin Bae, Hyeonho Choi
Summary: The high-performance blue phosphorescent organic light-emitting diode discussed in the article exhibits low operating voltage, high external quantum efficiency, low efficiency roll-off, and long operation lifetime, mainly attributed to the well-developed cohost and exciplex-forming mechanism.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Yennie H. Nguyen, Vinh Q. Dang, Joao Vitor Soares, Judy I. Wu, Thomas S. Teets
Summary: The lack of efficient and robust deep-blue phosphorescent metal complexes is a major challenge in electroluminescent color displays. Increasing the s-donating ability of the ligands can ameliorate the deactivation of blue phosphors by low-lying metal-centered states. We have revealed a synthetic strategy to access blue-phosphorescent complexes using two supporting acyclic diaminocarbenes (ADCs), which are stronger s-donors than N-heterocyclic carbenes (NHCs). These new platinum complexes have excellent photoluminescence quantum yields, with four out of six complexes exhibiting deep-blue emission. Experimental and computational analyses confirm the destabilization of the (MC)-M-3 states by the ADCs.
Article
Nanoscience & Nanotechnology
Jihoon Kang, Ha Lim Lee, Won Jae Chung, Jun Yeob Lee
Summary: High triplet energy hosts for blue phosphorescent OLEDs were developed by decorating a meta linked bitriazine core with carbazole and tetraphenylsilyl functional groups. Two hosts, one symmetric and one asymmetric, were prepared. The asymmetric host with a carbazole unit and a tetraphenylsilyl unit exhibited higher external quantum efficiency and better long-term device stability compared to the symmetric host with two carbazole units. A high EQE of 19.7% and a long device lifetime of 2093.6 h at 100 cd m-2 were achieved using the asymmetric host.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Biochemistry & Molecular Biology
Jingyu Wang, Jiaxuan Yin, Xiaofang Li, Zhe Wang, Ruixia Wu, Liang Zhou
Summary: The efficiency of blue phosphorescent organic light-emitting diodes (PhOLEDs) is still unsatisfactory due to low-lying HOMO level and interfacial miscibility of organic materials. In this study, co-host and co-dopant structures were designed to improve the efficiency of blue PhOLEDs through solution processing. TcTa acted as a hole transport ladder and bipolar mCPPO1 helped to balance carriers' distribution and weaken triplet-polaron annihilation. The introduction of FCNIrPic as a second dopant accelerated hole injection and facilitated energy transfer. Furthermore, a microcavity effect between the anode and cathode caused an interesting phenomenon.
Article
Materials Science, Multidisciplinary
Chao Tang, Jianmei Chen, Zhenghua Zhu, Changdong Shao, Yong Wang, Youhua Chen, Zijie Zhu, Mingxuan Shi, Yue Jin, Hui Yang, Jiujuan Fu, Yuxin Han, Jiayi Hu, Fangfang Wang, Jia Hu, Xudong Cao, Yuhe Kan, Lili Zhang
Summary: Two carbazole or carbazole-3-carbonitrile/pyridine-based bipolar materials were synthesized as hosts for solution-processed sky-blue PhOLEDs and green TADF-OLEDs. Increasing the doping concentration from 10% to 15% slightly reduced the turn-on voltage of the devices based on 2,6-CzPy. Introduction of cyano substituents improved the thermal stability of the hosts, but also resulted in deeper HOMO levels and larger hole injection barriers in CN-2,6-CzPy, which did not contribute to enhanced device performance.
Article
Chemistry, Multidisciplinary
Rajendra Kumar Konidena, Junseop Lim, Jun Yeob Lee
Summary: A new molecular design based on carbazole was developed for the development of high triplet energy bipolar host materials for blue PhOLEDs. Two new isomeric host materials were synthesized, showing high triplet energy without compromising bipolar charge transporting property. The compounds demonstrated good performance in blue PhOLEDs applications, with higher EQE, current efficiency, and efficiency roll off compared to their analogues.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Optics
Qi Zhu, Liang Zhou, Weiqiang Liu, Yingjie Cui, Ruixia Wu, Jiahai Wang, Qingduo Duanmu
Summary: An efficient blue organic electroluminescent device was achieved by optimizing the double light-emitting layers structure, selecting appropriate host materials, and adjusting the doping concentration. The device exhibited good thermal stability and high current efficiency, making it a promising candidate for practical applications in the field of optoelectronics.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Cyril Poriel, Joelle Rault-Berthelot, Zuo-Quan Jiang
Summary: The development of phosphorescent organic light-emitting diodes (PhOLEDs) relies on the molecular design of high-efficiency host materials for red, green, and blue phosphors. By fine tuning the electronic and physical properties of the host materials, high External Quantum Efficiencies (EQEs) can be achieved. Pure hydrocarbon materials show potential for next-generation PhOLEDs.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Biochemistry & Molecular Biology
Gaozhan Xie, Jiangchao Wang, Yang Cao, Xudong Xue, Xiao Zhang, Chang Liu, Huanhuan Li, Ye Tao, Runfeng Chen
Summary: Three phosphine sulfide-based bipolar host materials, CzPhPS, DCzPhPS, and TCzPhPS, were synthesized with excellent thermal stability and high ET levels for blue PhOLEDs applications. Among them, CzPhPS exhibited the best performance in blue PhOLEDs, while DCzPhPS and TCzPhPS showed inferior device performance possibly due to enhanced hole-transporting ability from increased carbazole units.
Article
Biochemical Research Methods
Nguyen Van Trang, Nguyen Minh Tam, Tran Ngoc Dung, Minh Tho Nguyen
Summary: A series of host molecules modified by adding nitrogen-containing group have been designed for phosphorescent organic light-emitting diode devices, showing potential as blue phosphorescent materials.
JOURNAL OF MOLECULAR GRAPHICS & MODELLING
(2021)
Article
Engineering, Environmental
Yoon Sung Kim, Junseop Lim, Jun Yeob Lee, Yoonkyoo Lee, Changwoong Choo
Summary: Three benzoniitrile modified host materials were synthesized to improve the efficiency and lifetime of blue phosphorescent organic light-emitting diodes (PhOLEDs), with CNmSi-2DBF-Trz host material showing the best performance achieving high EQE and long lifetime.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Deli Li, Di Liu, Jiuyan Li, Ruizhi Dong, Botao Liu, Qinhe Wei
Summary: Two molecules, 3-BPyBCz and o-BPyBCz, have been developed as host materials for sky-blue phosphorescent organic light-emitting diodes (PhOLEDs), with extremely low driving voltages and superior performance.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Materials Science, Multidisciplinary
Chao Tang, Jianmei Chen, Yuxin Li, Xinchao Liu, Lili Zhang, Fangfang Wang, Jia Hu, Xudong Cao, Tao Jiang
Summary: Three new pyridine-cored alkyl-substituted carbazole derivatives were synthesized and their performances in organic electroluminescent devices were comprehensively studied. Among them, 2,7-MeCzPy exhibited the best EL performance, followed by 3,6-tBuCzPy and 3,6-MeCzPy.
ELECTRONIC MATERIALS LETTERS
(2021)
Article
Chemistry, Physical
Changli Zhang, Lingyun Lou, Yuzhan Li, Sirong Sun, Wentuo Hu, Kainan Wang, Dong Wang, Hui Cao, Wanli He, Zhou Yang
Summary: In this work, a series of host/guest ultralong organic room-temperature phosphorescent materials with lifetime- and color-tuning properties are reported. By doping a nonroom-temperature phosphorescence guest emitter, 1, 8-naphthalimide (NI), into solid host matrices, the tunability of lifetime and color is achieved. The results demonstrate that strong intermolecular interactions and the guest's intersystem crossing (ISC) ability play a significant role. Additionally, various methods, such as handwritten pens and screen printing, are used to realize security protection and anticounterfeit encryption applications for the RTP materials, improving their commercial viability.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Ki-Beom Moon, Jae-Heung Jeon, Hyukjun Choi, Ji-Sun Park, Su-Jin Park, Hyo-Jun Lee, Jeong Mee Park, Hye Sun Cho, Jae Sun Moon, Hyunwoo Oh, Sebyung Kang, Hugh S. Mason, Suk-Yoon Kwon, Hyun-Soon Kim
Summary: The global pandemic of SARS-CoV-2 has led to a public health emergency, sparking rapid progress in vaccine development worldwide. Plant-derived SARS-CoV-2 VLPs offer promising platforms for vaccine development, with potential applications to enhance immunogenicity and address mutations in S antigens.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Deok-Ho Roh, Jun-Hyeok Park, Hyun-Gyu Han, Ye-Jin Kim, Daiki Motoyoshi, Eunhye Hwang, Wang-Hyo Kim, Joseph Mapley, Keith C. Gordon, Shogo Mori, Oh-Hoon Kwon, Tae-Hyuk Kwon
Summary: Conventional photosensitizers with strong electronic coupling cannot achieve vectorial electron transfer due to rapid charge recombination. This study presents a design strategy to integrate both strong and relatively weak electronic coupling in a single molecule, enabling vectorial electron transfer in dye-sensitized solar cells.
Article
Plant Sciences
Seung Yong Shin, Su-Jin Park, Hyun-Soon Kim, Jae-Heung Jeon, Hyo-Jun Lee
Summary: This study identified the importance of ROS and Ca2+ in de novo root organogenesis in detached leaves. It was found that ROS and Ca2+ have different functions in regulating this process, with ROS acting upstream of auxin signaling and Ca2+ acting downstream of auxin. Furthermore, it was observed that ROS and Ca2+ have little effect on auxin biosynthesis and transport in explants.
Article
Engineering, Industrial
Hyejin Jang, Sujin Park, Byungun Yoon
Summary: In recent years, the importance of user innovation has increased, leading enterprises to demand efficient and systematic user needs analysis for their products or services. However, existing studies analyzing user needs for technology development often provide inaccurate results due to vocabulary differences between social data and patent databases. To address this problem, this study proposes an approach that analyzes the subject-action-object structures in both patents and user reviews to explore technology opportunities. By connecting user needs found in reviews with technological structures in patents, this approach can help identify technological opportunities to address user needs.
ENGINEERING MANAGEMENT JOURNAL
(2022)
Article
Cell Biology
Ji-Sun Park, Su-Jin Park, Suk-Yoon Kwon, Ah-Young Shin, Ki-Beom Moon, Jeong Mee Park, Hye Sun Cho, Sang Un Park, Jae-Heung Jeon, Hyun-Soon Kim, Hyo-Jun Lee
Summary: Temperature is a major environmental factor affecting tuberization in potatoes, with high temperatures suppressing tuber development. This study reveals that potatoes have temporally distinct molecular mechanisms to finely control tuber development in response to temperature.
Article
Plant Sciences
Su Jin Park, Eun-Kyung Bae, Hyunmo Choi, Seo-Kyung Yoon, Hyun-A Jang, Young-Im Choi, Hyoshin Lee
Summary: Plants have evolved defense mechanisms to cope with unfavorable climatic conditions. This study investigates the role of the novel gene PagSAP11 in hybrid poplar under drought stress and found that it enhances tolerance to drought stress and promotes growth. These findings suggest that PagSAP11 could be a promising candidate gene for engineering trees with improved stress tolerance and growth.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Chae Gyu Lee, Chaiheon Lee, Joonhee Lee, Jung Seung Nam, Byeong-Su Kim, Tae-Hyuk Kwon
Summary: This study investigates the irreversible degradation of an Ir-based photosensitizer encapsulated in nanogels through the oxidation of intracellular thiols using reactive oxygen species. The photosensitizer is stably encapsulated through hydrophobic interactions, providing high biocompatibility under normal cellular conditions. Upon photoirradiation, the photosensitizer generates high levels of reactive oxygen species, irreversibly oxidizing the thiols and inducing cancer cell apoptosis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Dentistry, Oral Surgery & Medicine
Hye Ri Gug, Yeoung-Hyun Park, Su-Jin Park, Ji Yeon Jang, Ji-Hyun Lee, Dong-Seol Lee, Won -Jun Shon, Joo-Cheol Park
Summary: This study evaluated the potential application of CPNE7-derived functional peptide (CPNE7-DP) in dentin caries. The results showed that CPNE7-DP was stable in caries-like environments and regenerated tubular tertiary dentin, alleviating inflammation and reducing the expression of inflammatory cytokines. CPNE7-DP may help overcome the limitations of current restorative caries treatments.
ARCHIVES OF ORAL BIOLOGY
(2022)
Article
Engineering, Civil
Su Jin Park, Seungmo Kang, Young-Ji Byon, Seung-Young Kho
Summary: Existing research on transit network design tends to oversimplify the complexity of real-life networks. This paper proposes a multiobjective approach to design a more realistic and efficient transit network, considering system efficiency, user inconvenience, and transit equity. By applying a multiobjective nondominated sorting genetic algorithm-II and a neighborhood local search method, and incorporating variable transit demand arising from private vehicle traffic volume, the paper finds solutions that improve transit equity with minimal losses of other objectives.
JOURNAL OF ADVANCED TRANSPORTATION
(2022)
Correction
Plant Sciences
Seung Yong Shin, Su-Jin Park, Hyun-Soon Kim, Jae-Heung Jeon, Hyo-Jun Lee
Article
Plant Sciences
Ji-Sun Park, Kwang Hyun Park, Su-Jin Park, Seo-Rin Ko, Ki-Beom Moon, Hyunjin Koo, Hye Sun Cho, Sang Un Park, Jae-Heung Jeon, Hyun-Soon Kim, Hyo-Jun Lee
Summary: The expression of the cytokinin-responsive gene WUSCHEL determines the difference in shoot regeneration capacity in different potato genotypes. The docking pose of cytokinins mediated by hydrogen bonding with core residues may play a pivotal role in WUS expression and shoot regeneration. Whole-genome sequencing analysis revealed core sequence variations in the WUS promoters that differentiate low- and high-efficiency genotypes.
Correction
Plant Sciences
Ki-Beom Moon, Su-Jin Park, Ji-Sun Park, Hyo-Jun Lee, Seung Young Shin, Soo Min Lee, Gyung Ja Choi, Sang-Gyu Kim, Hye Sun Cho, Jae-Heung Jeon, Yong-Sam Kim, Youn-Il Park, Hyun-Soon Kim
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Education & Educational Research
Su Jin Park
Summary: The purpose of this study was to develop an invention instruction program based on TRIZ for preservice invention teachers and examine its effects on teachers' creativity beliefs, creativity, and invention teaching self-efficacy. The results showed that the TRIZ instructional method significantly increased creativity beliefs, creativity, and invention teaching self-efficacy in preservice teachers. It was also found that the TRIZ program had different effects on subdimensions of creativity. The study suggests that TRIZ is an effective instructional method to enhance teachers' creativity and confidence in their invention teaching ability.
EDUCATION AND INFORMATION TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Jung Seung Nam, Youngjoo Hong, Chae Gyu Lee, Tae In Kim, Chaiheon Lee, Deok-Ho Roh, In Seong Lee, Songa Kweon, Gyunhyeok Ahn, Seung Kyu Min, Byeong-Su Kim, Tae-Hyuk Kwon
Summary: Reactive oxygen species, particularly singlet oxygen generated through energy transfer, have been recognized for their strong oxidation ability in controlling oxidation reactions efficiently. However, traditional singlet oxygen generators often have issues of poor solubility, low stability, and low biocompatibility. In this study, a hyperbranched aliphatic polyaminoglycerol (hPAG) is introduced as a spin-flip-based electron transfer singlet oxygen generator. The coexistence of a lone pair electron on the nitrogen atom and a hydrogen-bonding donor between hPAG and O-2 enables the direct electron transfer and subsequent spin-flip process to generate singlet oxygen. The spin-flip-based electron transfer pathway is analyzed through various experimental and computational studies. The hPAG singlet oxygen generator is successfully applied in photodynamic therapy and as an antimicrobial reagent.
Article
Microbiology
Daejin Lim, Su-Jin Park, Ha Young Kim, Minsang Shin, Miryoung Song
Summary: The antibacterial function of lipocalin2 (Lcn2) has been found to be effective against Acinetobacter baumannii infections, reducing bacterial survival and increasing survival rates in infected mice. Lipocalin2 may be a potential alternative therapeutic agent for A. baumannii.
JOURNAL OF MICROBIOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Zihan Ma, Lishuang Wang, Tingting Chen, Guangning Wang
Summary: In this study, two kinds of 3D self-doped (N/O) lilac-based and coriander-based porous carbons with high performance have been prepared.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Qin Wang, Yun-Fan Yan, Jiao-Lin Weng, Ying Huang, Fu Yang, Hao-Hui Xie, Fei Tan, Fa-Kun Zheng, Jian-Gang Xu
Summary: Balancing energy and mechanical sensitivities is a challenging issue in the field of energetic materials. This study constructed a 3D energetic metal-organic framework with nitrogen-rich ligand and NO3- anions. The framework demonstrated high stability, energy density, and excellent mechanical sensitivities, making it a potential insensitive energetic material.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Marrium Saeed, Urooj Kamran, Amina Khan, Md Irfanul Haque Siddiqui, Hasan Jamal, Haq Nawaz Bhatti
Summary: In this study, magnesium-aluminum layered double hydroxides (Mg-Al-LDH) were synthesized using an environmentally friendly hydrothermal technique for adsorbing the dye reactive green 5 (RG5). To improve the adsorption capability, composites were prepared by combining Mg-Al-LDH with low-cost Mangifera indica stone biomass (MISB). The results showed that the composites had high adsorption capacities for RG5 dye and could be regenerated.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Xuanlin Zhan, Xiaojie Li, Yunyan Zeng, Siyan Jiang, Chao Pan, Shiyu Pan, Jiaquan Huang, Heqian Zhang, Zhiwei Qin
Summary: This study reports on the potential prospects of natural products derived from the rhizosphere for the development of antibiotics and herbicides, as well as the advancements in cultivating a mutant strain that produces a substantial quantity of lydicamycins, a potent family for herbicide development.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Jie Zhu, Jiangtao Yu, Linhua Zhu, Xiaoxiao Yu, Jixing Liu, Yanhong Chao, Jingzhou Yin, Peiwen Wu, Jian Liu, Wenshuai Zhu
Summary: This study successfully demonstrates the 3D printing of attapulgite monoliths and investigates the influence of thermal treatment on their properties. The thermal treated monoliths show superior catalytic performance at low temperatures.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Yanzhu Ye, Yixiang Ye, Jiannan Cai, Zhongshui Li, Shen Lin
Summary: In this paper, a novel Pt/CoP/C photo-electro synergistic catalyst was successfully synthesized and its performance was investigated. The catalyst exhibited excellent photo-electro catalytic performance, with significantly higher hydrogen production compared to a commercial catalyst. The introduction of cobalt phosphide and the existence of Co3O4 were identified as key factors for enhancing the catalytic activity.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Nurul Hidayah Abu Bakar, Wan Norfazilah Wan Ismail, Hartina Mohd Yusop, Noreen Farzuhana Mohd Zulkifli
Summary: Hydrophobic coatings inspired by the lotus effect have gained popularity for their ability to solve various problems. The sol-gel method, utilizing silica, alumina, and titania, is explored as an environmentally friendly approach to produce water-based hydrophobic coatings. This study focuses on producing water-based hydrophobic coatings for cotton and polyester fabrics using a one-step sol-gel method. The coated fabrics exhibited improved hydrophobic properties, altered surface morphologies, and lower air permeability compared to uncoated fabrics. TEOS-PDMS coating provides a promising approach for enhancing the hydrophobic and surface properties of cotton and polyester fabrics.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Nikita Belko, Hanna Maltanava, Anatol Lugovski, Polina Shabunya, Sviatlana Fatykhava, Evgeny Bondarenko, Pavel Chulkin, Sergey Poznyak, Michael Samtsov
Summary: This study investigates the difference in electrochemical behavior between rhodamine B hydrazide and rhodamine B acylhydrazone, and finds that rhodamine B acylhydrazone exhibits higher reversibility in electrooxidation. These results can be applied for developing new sensors with desired electrochemical properties.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Showket Ahmad Bhat, Mohd Ikram
Summary: In this study, 0-3 particulate multiferroic composites were synthesized and characterized. The composites exhibited excellent ferroelectric and ferromagnetic properties, as well as high piezoelectric strain and magnetoelectric coupling effects.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Carla Gomes, Mariana Costa, Susana M. M. Lopes, Bernardo Albuquerque Nogueira, Rui Fausto, Jose A. Paixao, Teresa M. V. D. e Melo, Luisa M. D. R. S. Martins, Marta Pineiro
Summary: The development of sustainable processes requires the integration of green chemistry principles. In this study, a solvent-free synthesis method was developed to prepare new copper catalysts, which efficiently catalyze cycloaddition reactions under solvent-free mechanochemical conditions. Through this process, the principles of atom economy, reduction of solvents and auxiliaries, design for energy efficiency, and reduction of derivatives and catalysis are combined.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Zhihua Liu, Jinzhe Li, Jianguo Zhou
Summary: This study demonstrates the enhancement of photoelectrochemical activity of BiFeO3 photoelectrodes through ion modification, which increases visible light absorption and active area, leading to improved PEC water splitting performance.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Yisheng Zhang, Wensong Li, Jing Li, Fang Li, Wei Xue, Xinqiang Zhao, Yanji Wang
Summary: Pt/C and SO42-/ZrO2 were used as catalysts for the synthesis of p-aminophenol through the catalytic transfer hydrogenation of nitrobenzene in water with formic acid as the hydrogen source. The optimal Pt loading for PAP selectivity was found to be 1 wt%. The presence of different valence states of Pt affected both the nitrobenzene hydrogenation and formic acid decomposition. Among different solid acid catalysts tested, SO42-/ZrO2 exhibited the highest catalytic activity for p-aminophenol formation. Under the optimized reaction conditions, the conversion of nitrobenzene reached 80.0%, with a selectivity of 47.6% for p-aminophenol.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Pradyota Kumar Behera, Papita Behera, Amlan Swain, Santosh Kumar Sahu, Ajeena Sahoo, Laxmidhar Rout
Summary: We have developed a simple and direct method for the synthesis of diaryl ether using an oxygen bridged bimetallic CuMoO4 nanocatalyst under mild reaction conditions. The catalyst exhibited tolerance towards a wide range of substrates with various functional groups. It is efficient and recyclable. This methodology allows easy access to nitrofen derivatives (herbicides) from unactivated 2,4-dichlorophenol, which are important for agriculture and pharmaceuticals.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Yihua Fu, Yan Zhang, Changwei Hu, Zhishan Su
Summary: The mechanism of the reaction between CO2 and styrene oxide for cyclic carbonate was revealed using density functional theory calculations. The noncatalytic reaction occurred via a concerted mechanism, while in the presence of guanidine and tetrabutylammonium iodide (TBAI) co-catalysts, the epoxide ring-opening by nucleophilic attack of an iodide anion was predicted to be the rate-determining step. Guanidine acted as the H-bond donor to activate styrene oxide, facilitating the reaction with a lower activation barrier.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Saikat Khamarui, Sirshendu Ghosh
Summary: Copper nanorods (Cu-NRs) exhibit significant plasmonic behavior and can act as efficient catalysts in redox processes and coupling. A benign decarboxylative approach, utilizing localized surface plasmon resonance (LSPR) assisted catalysis with Cu-NRs, has been developed for the production of alkane analogues from alkyl carboxylic acids under visible light. The catalyst shows a broad substrate scope and high functional group tolerance, without the need for an external oxidant or proton source. A plausible mechanism for this recyclable nano-catalyst has also been proposed based on control experiments.
NEW JOURNAL OF CHEMISTRY
(2024)
